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The to find bioactive substances from plants is an important way to develop new microbicides one. Northwest China is rich in plant resources, is to find the the Fungicide ideal place. This article is in the basis of the Northwest Territories plant antibacterial activity screening, Botrytis cinerea (Botrytis cirerea), Fusarium graminearum (Fusarium graminearum), Phytophthora capsici (Phytophthora capsici), Apple Colletotrichum gloeosporioides (Glomerella cingulata ), Corn Leaf Blight (Exserohilum turcicum) and wheat powdery mildew (Blumeria graminis) tested strains, selected families and 27 species of the Northwest Territories, and its antibacterial activity were measured in the system, and which higher antimicrobial activity of cumin, a more in-depth research, as a waste and pollution sources ginkgo testa antibacterial activity of Jiangsu Taixing study, the following conclusions: 1. Found when the mass concentration of the test species mycelial growth inhibition test, 0.1g dry sample / ML, cumin, Angelica, short-haired, independent living, Chiba live alone, disk flowers of honeysuckle, ghost lights engine, yellow jasmine, fir Taibai least one mycelial growth of more than 80% inhibition; the Cumin, shorthaired independent living, wild carrots, Angelica, Chiba Duhuo, ghost lamps engines, lion seven, fees dishes, Taibai fir extract at least spore germination of a pathogen that more than 80% inhibition; 2. 27 species of wheat powdery mildew potted antibacterial activity test, cumin, short-haired live alone extract higher efficacy of wheat powdery mildew, are in more than 70%; measured in vitro results, select vitro determination under the antibacterial activity of higher plants of tomato gray mold fructigenum vivo determination found that the The Ghost Lights engine, the strongest protective effect of the Taibai fir leaves of tomato gray mold, efficacy each contributed more than 55%, is worth further study . 3. Highly active plant further study Shorthair Duhuo, the Taibai fir active site were concentrated in the roots and leaves; in the study of the most suitable extraction solvent, short-haired independence the live root antimicrobial activity is mainly concentrated in the ethyl acetate extract , Taibai fir leaves are mainly concentrated in the acetone extract ghost the lights engine Root concentrated in the polar solvent extract; further optimum extraction solvent extract of mycelium virulence test results, short-haired live alone root acetate ethyl extract of the corn leaf pathogen, Phytophthora capsici and Botrytis cinerea antibacterial activity, its EC 50 were 4.087,34.8458 and 6.9204g / L, followed by the ghost lights engine acetone extract of the roots of the corn leaf pathogen, Phytophthora capsici and Botrytis cinerea EC 50 7.8275,9.6318 and 9.2252g / L. 4. Cumin sample antibacterial activity, cumin sample inhibiting substances on five kinds of pathogens mainly concentrated in the ethyl acetate extract of the seeds, EC 50 , respectively 10.1078,16.6725,9.1446,14.1914 6.1335g / L, and wide inhibitory spectrum; the cumin oil higher wheat powdery mildew role compounds. 5. SFE-CO 2 optimum conditions for extraction of cumin oil: raw material particle size 30 mesh when the sample volume for 4g dry sample, extraction pressure 5000Psi temperature of 55 ° C, static extraction time for 5min, CO 2 flow to 60mL. 6. The Bark Extract Ginkgo biloba species of Phytophthora capsici, the inhibitory effect of Botrytis cinerea main focus on the parts of the petroleum ether extract: Exserohilum turcicum, Fusarium graminearum, the inhibitory effect of Apple anthrax bacteria are mainly concentrated in the oil ether extract, acetone extract parts; higher ethanol extract of wheat powdery mildew treatment, up to the knife stone 0%; hydrogenated white acid on the chemical composition of the Ginkgo biloba exocarp Fusarium graminearum Apple anthrax bacteria The antibacterial better inhibition rates were 76.16 percent, 52.93 percent; ginkgo phenol wheat powdery mildew showed strong antibacterial activity, its efficacy were: protective effect sl. The 97 brother therapeutic effect 78.69 brother
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